ASTROSAT CZTI

Data Quality Report

Orbit 20220713_A11_101T01_9000005238_level2

Creation date: 2026-01-03T18:25:34.964568
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A11_101T01_9000005238cztM0_level2.fits modeM0/AS1A11_101T01_9000005238cztM0_level2_quad_clean.evt
Size (bytes)1,920,055,6802,025,342,720
Size1.8 GB 1.9 GB
Events in quadrant A12,103,54313,037,900
Events in quadrant B9,539,33010,523,930
Events in quadrant C11,691,27012,138,542
Events in quadrant D9,937,17010,789,877

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04497700
B06787240
C05221890
D06063290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A044460
B044400
C044500
D044430

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08080
B08110
C08070
D08090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2168463960.182618%
B2165494341320.047657%
C21683062082.863072%
D216806133846.173261%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 304433 217274 0 0 0.00% 0.00%
B 304430 191240 0 0 0.00% 0.00%
C 304433 217030 0 0 0.00% 0.00%
D 304433 217032 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 7 110 9830 8.71 3163 2959 789.1
A 9 19 9829 8.71 3163 2959 789.1
A 0 29 9683 8.52 3163 2959 789.1
B 2 9 8156 11.63 2530 2414 493.8
B 3 80 7650 10.6 2530 2414 493.8
B 5 128 6646 8.57 2530 2414 493.8
C 1 81 9688 8.66 3088 2893 784.9
C 1 80 9369 8.25 3088 2893 784.9
C 3 202 9066 7.86 3088 2893 784.9
D 7 3 7369 6.33 2850 2596 753.9
D 10 113 7267 6.2 2850 2596 753.9
D 10 189 7202 6.11 2850 2596 753.9

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter